The value of torque available in the
open direction can be configured.
Refer to valve manufacturer
for recommended value.
50
m
50
m
P?
k
PC
k
Ir
k
tP
m
cr
m
c1
k
c2
k
c3
m
tC
k
tO
m
LC
k
LO
m
50
The opening torque value can be
varied between 40% and Rated, in 1%
increments. In addition “Boost” can
be configured when no open torque
protection is required.
BOOST SHOULD NOT BE
SELECTED WHEN THE ACTUATOR
HAS BEEN CONFIGURED TO OPEN
ON TORQUE
(refer to [C3] page 21)
UNLESS BACK SEATING AT RATED
TORQUE IS ACCEPTABLE.
Using the
+
and
-
keys, display the
recommended torque value.
In the absence of a recommended
torque value, try a low setting and
increase until satisfactory valve
operation is achieved.
If the actuator fails to
complete a open valve operation
due to the set torque being
reached (
Torque Trip OP
Alarm, page 5)
this may indicate a valve and/or
process problem or change. It is the
responsibility of the user to ensure
the valve and process conditions are
within specified operational limits
before increasing the Set Open
torque value.
NOTE: Rated torque is quoted on the
actuator nameplate. Boost torque is at
least 140% of Rated torque.
PRESS THE KEY.
The displayed value will flash (stored),
indicating that it has been set.
Should the set level of torque be
developed in opening, the actuator will
torque trip and stop.
PRESS THE m KEY.
40%
99%
Rated
Boost
In checking mode, on pressing the
m
key after reviewing open torque setting,
the display will revert to valve position.
23
Open Torque
tO
Open Torque
40%
Open Torque
99%
Open Torque
100%
Open Torque
Boost
Torque
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